OMAPL138如何在Linux下使用EDMA3驱动

yyj

1. [code]EDMA sample test application
   
2. /*
   
3. * edma_test.c
   
4. *
   ) i8 q; b9 W) P9 m5 P. w; \
5. * brief  EDMA3 Test Application
   
6. *
   * d+ g) }- M' n/ `4 I+ x5 r) p; I
7. *   This file contains EDMA3 Test code.
   ) u% I5 G" a" P3 `% L$ G8 s% t
8. *
   2 q& {" G+ H& T
9. *   NOTE: THIS FILE IS PROVIDED ONLY FOR INITIAL DEMO RELEASE AND MAY BE
   
10. *         REMOVED AFTER THE DEMO OR THE CONTENTS OF THIS FILE ARE SUBJECT
    , q5 H. x: ?4 A' b- v
11. *         TO CHANGE.
    : n3 J. F' \. h: Y8 a) L* B
12. *
    
13. * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/
    % O" {1 b2 H+ X% Q# g2 z5 T* h
14. *
    5 |* d" K  \6 ~3 L& r0 L; _
15. * This program is free software; you can redistribute it and/or
    
16. * modify it under the terms of the GNU General Public License as
    
17. * published by the Free Software Foundation version 2.
    
18. *
    
19. * This program is distributed "as is" WITHOUT ANY WARRANTY of any
    + w# R: o. T0 e# o0 M& M, v4 w
20. * kind, whether express or implied; without even the implied warranty
    . Q. e% M$ p. g6 O+ @4 i+ }( ]
21. * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    2 x$ I4 m6 Z+ r* }
22. * GNU General Public License for more details.
    1 Q7 Y% \$ ~1 a
23. */
    8 m) ]9 e: R% r, w, j4 t8 U  h
24. 
    
25. #include <linux/module.h>
    / e. H( m5 E( h0 ?
26. #include <linux/init.h>
    
27. #include <linux/errno.h>
    . c1 G4 h1 P5 J2 B* J
28. #include <linux/types.h>
    
29. #include <linux/interrupt.h>
    ( i6 c% M& [$ Q. F) n  b
30. #include <asm/io.h>
    1 l/ j* w6 n/ u$ G
31. #include <linux/moduleparam.h>
    4 g3 u" u6 H: i/ D
32. #include <linux/sysctl.h>
    
33. #include <linux/mm.h>
    4 w3 P2 H/ }6 {  a. [- Q) N$ i% T# M6 O
34. #include <linux/dma-mapping.h>
    ! h, @# T2 b; A" D2 l: j
35. 
    9 ^3 Z% V& P9 m6 k0 M# n
36. #include <mach/memory.h>
    6 z0 Z, _0 |( o3 u
37. #include <mach/hardware.h>
    
38. #include <mach/irqs.h>
    / }6 K5 `! p5 [0 _. }! i/ ]' \8 F
39. #include <asm/hardware/edma.h>
    ' L$ K. K* Q) K+ P, w
40. 
    8 ]3 X  ^; ~7 k' H' K
41. #undef EDMA3_DEBUG
    ! a+ Z2 h; {) U* J8 ]
42. /*#define EDMA3_DEBUG*/
    
43. 
    
44. #ifdef EDMA3_DEBUG
    
45. #define DMA_PRINTK(ARGS...)  printk(KERN_INFO "<%s>: ",__FUNCTION__);printk(ARGS)
    - L- C8 E$ W: d( S0 f% J
46. #define DMA_FN_IN printk(KERN_INFO "[%s]: start\n", __FUNCTION__)
    - x; i$ d) {0 O2 m9 r
47. #define DMA_FN_OUT printk(KERN_INFO "[%s]: end\n",__FUNCTION__)
    5 j, B* O; O; w
48. #else
    * D* |/ @+ _+ W. V' Z( b
49. #define DMA_PRINTK( x... )
    ; E  ]8 w$ \# F5 {  G2 x
50. #define DMA_FN_IN
    $ i- E, N7 I3 U7 ]/ T- `
51. #define DMA_FN_OUT
    
52. #endif
    
53. 
    ; N- e8 P; B( x9 n6 g. a
54. #define MAX_DMA_TRANSFER_IN_BYTES   (32768)
    
55. #define STATIC_SHIFT                3
    
56. #define TCINTEN_SHIFT               20
    
57. #define ITCINTEN_SHIFT              21
    
58. #define TCCHEN_SHIFT                22
    " a, R" i1 y: `) B, q
59. #define ITCCHEN_SHIFT               23
    
60. 
    
61. static volatile int irqraised1 = 0;
    
62. static volatile int irqraised2 = 0;
    ( \" I( q$ V2 I" c6 z
63. 
    ' s, b/ Y, D( V: e# Y4 m
64. int edma3_memtomemcpytest_dma(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    / M% Y$ Q$ Z* n
65. int edma3_memtomemcpytest_dma_link(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    
66. int edma3_memtomemcpytest_dma_chain(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    
67. 
    & G' E6 A8 [4 `5 P% t2 P6 u0 l
68. dma_addr_t dmaphyssrc1 = 0;
    5 @3 l- ^* z* w3 f5 ?, t" R" }  j
69. dma_addr_t dmaphyssrc2 = 0;
    % Z9 k& F8 x: `; b! o; [1 D$ \
70. dma_addr_t dmaphysdest1 = 0;
    + z; Z& K* b! F% U
71. dma_addr_t dmaphysdest2 = 0;
    : w" `( X: ^6 U9 C3 L0 `# n/ K
72. 
    9 {" F+ K- p! y# {0 h2 G
73. char *dmabufsrc1 = NULL;
    / Y% e' N+ Z" f) j" W* U
74. char *dmabufsrc2 = NULL;
    0 @9 R  O; Z9 R$ m  W; L& t8 o% a' ~' ]! T
75. char *dmabufdest1 = NULL;
    
76. char *dmabufdest2 = NULL;
    8 m8 {7 q4 p. s8 y
77. 
    ! ~( N1 y" @' O
78. static int acnt = 512;
    ; E& a0 U7 T( n- P* v
79. static int bcnt = 8;
    
80. static int ccnt = 8;
    
81. 
    4 \& S$ F. M- J1 y" v# l
82. module_param(acnt, int, S_IRUGO);
    
83. module_param(bcnt, int, S_IRUGO);
    
84. module_param(ccnt, int, S_IRUGO);

复制代码

) M. y( A3 x( s  {. g
6 {* u! U: d$ S/ e- n# @      这是在TI上找到的一个针对Davanci处理器简单的EDMA3驱动程序测试例程的一部分，我在编译的过程中是用
, G: L7 T6 t& ]$ D) {6 narm-none-linux-gnueabi-gcc  -I /home/tl/omapl138/linux-3.3/arch/arm/include -I /home/tl/omapl138/linux-3.3/include  EDMA3test.cpp -o EDMA3这个命令来链接库文件进行编译，但是报的错误特别多，我又试着一个函数一个函数往进加，仍然是很多错误。
( W7 C2 ^& s" }9 o' B# D/ t     我想问一下如何用一个简单的程序来测试一下EDMA3的驱动。
6 A" s3 \! b6 d
* H3 l) t7 t  `5 @
0 G, o( s1 n2 @$ G; [